Meaning of “mine” - Learner’s Dictionary

mine

noun [ C ] us uk /maɪn/
Extra Examples
He is proposing the nationalization of diamond mines.There have been many accidents since the mine opened last year.Several miners were trapped in the mine following the explosion.The mines produce hundreds of tonnes of coal every day.Most of the mines have been closed.
UNDERGROUND

B2 an underground system of holes and passages where people dig out coal or other minerals

BOMB

a bomb hidden in the ground or water that explodes when it is touched:

He was killed when he drove over a mine.
→ See also gold mine

(Definition of “mine noun” from the Cambridge Learner’s Dictionary © Cambridge University Press)